<!DOCTYPE html>
<html lang="en">

<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>学成在线首页</title>
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</head>

<body>
    <div class="w header">
        <!-- logo -->
        <div class="logo"> 盒子</div>
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</body>

</html>